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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/AHG5VVFJTPBBYPN2CETESEF3KN4IZ55N/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "A77275A8298C4CE7BCCC45D9777CAC13@CactusJackPC",
    "message_id_hash": "AHG5VVFJTPBBYPN2CETESEF3KN4IZ55N",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/IN3KT35QJCK3NI2S2AZW7QUUO5V6QXUS/?format=api",
    "sender": {
        "address": "kd1pe.1 (a) gmail.com",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Jack K.",
    "subject": "[amsat-bb] Re: Arrow vs M-Squared Antenna Question",
    "date": "2009-04-22T21:16:19Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/IN3KT35QJCK3NI2S2AZW7QUUO5V6QXUS/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Dave, if you want a more Technical answer, you may feel free to contact me \noff the BBS (Direct) and I will get as technical as you like. The simple \nversion is that at its center, an antenna element is at a null point and it \nmay (by design) be either free floating (not grounded) or grounded to the \nmast. Truthfully it boils down to who designed the antenna and what the \ndesigners preference was... Operationally there is little if any difference \nfrom this standpoint. Constructionally it is easier to make a grounded \nelement yagi and of course by design they should also (unless it is a really \ncrappy design and there are some out there) be stronger (more robust) than \nthe insulated antennas...\n\nBottom line, don't worry about gain, most advertized figures lie anyway in \nthat they give a figure devised for their own (not yours the operators) \nends... If the antenna does what you want, then it is a good one, if it \ndoesn't it is no good for you... Remember the higher the gain the smaller \nthe radiation pattern and the harder it is to hit a target (think shotgun \nVs. Rifle) The shot gun has less directional gain, and will not shoot as \nfar, but it is easier to hit a close in target (LEO's) than is the higher \ngain (Rifle) antenna...\n\nFor all intents and purposes a 3-4 element yagi is all you need on 2 meters \nand 4-5 on 435 Mc.\n\nDE KD1PE\n\n\nSubject: [amsat-bb] Arrow vs M-Squared Antenna Question\n\n\n>I just received an Arrow and I already had an M-Squared 2m antenna. The\n> M-Squared has the elements isolated from the boom by means of rubber\n> grommets; the Arrow has the elements attached to the boom and they are not\n> isolated. It seems to me that makes the elements, boom, mast and coax \n> center\n> conductor all grounded. Right?\n>\n>\n> Doesn't that make the Arrow less effective in radiating and in reception?\n>\n> Dave // DM78qd // KA0SWT\n> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb \n\n",
    "attachments": []
}